My Correct answers on mature cards: usually about 80%.
For example: Today: 49/60 (81.67%)
I want to increase this to around 90%.
Could you please advise what settings I should change in order to optimize my study efficiency? Thank you.

It consists of two main parts: scheduler and optimizer.

The scheduler is based on a variant of the DSR (Difficulty, Stability, Retrievability) model, which is used to predict memory states. The scheduler aims to achieve the requested retention for each card and each review.

The optimizer applies Maximum Likelihood Estimation and Backpropagation Through Time to estimate the stability of memory and learn the laws of memory from time-series review logs. Then, it can find the optimal retention to minimize the repetitions via the stochastic shortest path algorithm.